The TreeML file format is a for the 2003 InfoVis Conference Contest to represent data trees based on a nested Branch/Leaf model. Unlike GraphML, this is a relatively unofficial file format.

TreeML Specification

TreeML documents begin with an opening tag followed by a list of declarations defining attribute names and types. Supported data types are :
<tree> <declarations> <attributeDecl name="name" type="String"/> <attributeDecl name="number" type="Real"/> </declarations>

Tree structure is constructed through the use of and tags. Branches are nested within each other, and contain leaves. Leaves cannot be nested, and are representative of individual data nodes, a representation of the tree structure created is below :
<branch> <attribute name="name" value="Root Branch"> <branch> <attribute name="name" value="Sub Branch 1"> <leaf> <attribute name="name" value="Leaf 1"> <attribute name="number" value="1"> </leaf> <leaf> <attribute name="name" value="Leaf 2"> <attribute name="number" value="2"> </leaf> </branch> <branch> <attribute name="name" value="Sub Branch 2"> <leaf> <attribute name="name" value="Leaf 3"> <attribute name="number" value="3"> </leaf> <leaf> <attribute name="name" value="Leaf 4"> <attribute name="number" value="4"> </leaf> </branch> </branch>

Loading the TreeML File

TreeML Files are loaded in the same manner as a GraphML File. Build a TreeML reader and use it to load the TreeML file into a graph. This also throws a DataIOException, so it has to be wrapped in a try/catch loop.

Graph myTree = null; try { myTree = new TreeMLReader().readGraph("/TreeFile.xml"); } catch(Exception e){ e.printStackTrace(); System.out.println("Died trying to open TreeML File"); System.exit(1); } courses/ fall2006/ tutorials/ information_visualization/ TreeML
last modified Monday December 18 2006 6:32 am EST

attachments [paper clip]

     name last modified size
[IMG]treeml_diagram.jpg Dec 18 2006 6:31 am 12.2kB